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Synergistic weeding composition for paddy field

A composition and a technology for paddy fields are applied in the field of weeding and synergistic compositions in paddy fields, which can solve the problems of ecological environment threat, chemical weeding crisis, inducing weed resistance, etc. Improve the effect of use

Inactive Publication Date: 2016-11-09
GUANGDONG ZHONGXUN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chemical weeding is one of the main means of weed control in paddy fields. Extensive use of chemical herbicides, long-term use of a single species, induces weed resistance and poses a threat to the ecological environment. Chemical weeding is facing a crisis

Method used

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  • Synergistic weeding composition for paddy field
  • Synergistic weeding composition for paddy field
  • Synergistic weeding composition for paddy field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Indoor toxicity assay.

[0022] Put a certain amount of soil in a plastic pot with a height of 6 cm and a diameter of 20 cm, sow 15 to 20 seeds of the target weeds in the plastic pot, cover with 0.5 to 1 cm thick fine soil, and cultivate them in a greenhouse until the weeds grow to 5cm for spray treatment, spray 2mL per bowl, each treatment was repeated 4 times, and the treatment without medicine was set as the control. After treatment, the test materials were cultured in the greenhouse, and the growth of the target weeds was observed regularly. After 20 days of treatment, the fresh weight of aboveground weeds was weighed, and the fresh weight inhibition rate was calculated by the least square method.

[0023] According to the Gowing method to evaluate the combination of herbicides (NY / T 1155.7-2006), the formula is as follows:

[0024] E 0 = X + Y - ...

Embodiment 2

[0037] Embodiment 2: Composition Pesticide Formulation Technology.

[0038] 15% (R)-2-{4-[(6-Chloro-2-benzo)oxy]phenoxy}-N-(2-fluorophenyl-N-methylpropionamide) 3% 3- Chloro-2-methyl-N-(5,8-dimethoxy-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)benzenesulfonamide dispersible oil suspension : (R)-2-{4-[(6-chloro-2-benzo)oxy]phenoxy}-N-(2-fluorophenyl-N-methylpropionamide) 20%, 3-chloro -2-Methyl-N-(5,8-dimethoxy-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)benzenesulfonamide 2%, 500#8 %, Sodium Lignosulfonate 4%, White Carbon Black 2%, NNO 2%, Silicon Magnesium Silicate 2%, Calcium Lauryl Sulfonate 4%, Silicone 3%, Rapeseed Oil 5%, Oil acid methyl ester to 100%. Put the above materials into the reactor mixer together, stir for 2 hours, open the feed valve at the bottom of the kettle, inject the materials into the multi-stage sand mill for grinding, and the fineness of the ground materials is 98% after passing through 5-10um. Put it in a high shear emulsification kettle for 4 hours.

[003...

Embodiment 3

[0040] Example 3: The composition controls weeds in paddy fields.

[0041] Experimental crops: direct seeded rice, grown to 3-4 leaf stage.

[0042] Gramineae weeds in paddy fields: Stephania chinensis at 3-4 leaf stage, barnyardgrass at 4-5 leaf stage, the sum of stephenia and barnyardgrass accounts for more than 85% of the total number of grass weeds.

[0043] Test location: Shizhen Village, Chenjiang Town, Zhongkai District, Huizhou City, Guangdong Province.

[0044] Test agent and dosage:

[0045] (1#) 15% (R)-2-{4-[(6-chloro-2-benzo)oxy]phenoxy}-N-(2-fluorophenyl-N-methylpropionamide)· 3% 3-Chloro-2-methyl-N-(5,8-dimethoxy-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)benzenesulfonamide oil Suspending agent, active ingredient dosage 120g a.i. / ha;

[0046] (2#) 15% (R)-2-{4-[(6-chloro-2-benzo)oxy]phenoxy}-N-(2-fluorophenyl-N-methylpropionamide)· 3% 3-Chloro-2-methyl-N-(5,8-dimethoxy-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)benzenesulfonamide oil Suspending agent, the active ingre...

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Abstract

The invention relates to a synergistic weeding composition for a paddy field. The synergistic weeding composition comprises a compound (A) and a compound (B) in a weight ratio of (1-20): (1-10), wherein (A) is (R)-2-{4-[(6-chloro-2-benzo)oxy]phenoxy}-N-(2-fluorophenyl-N-methylpropanamide), and (B) is one selected from a group consisting of 3-chloro-2-metyl-N-(5,8-dimethoxy-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)benzsulfamide and 3-trifluoromethyl-N-(5,8-dimethoxy-[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)pyridinesulfonamide. The synergistic weeding composition provided by the invention exerts synergistic effect on grassy weeds, improves weeding effect and is safe to paddy rice.

Description

technical field [0001] The invention relates to a compound pesticide combination and its application technology, in particular to a synergistic composition for weeding in paddy fields. Background technique [0002] Rice is the number one food crop in my country. With a series of centralized land management policies and measures such as land transfer, large grain growers and family farms continue to emerge. Farmers are more and more inclined to labor-saving, time-saving, and efficient light-duty cultivation methods in rice planting. The planting area of ​​rice seedling throwing fields and direct-broadcast fields continues to expand, but direct-broadcast paddy fields are often seriously damaged by weeds, and weed control becomes a live broadcast. The key to the success of rice fields, barnyardgrass and stephenia weeds are becoming more and more serious, and have become an urgent problem to be solved in current agricultural production. [0003] Chemical weeding is one of the m...

Claims

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Application Information

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IPC IPC(8): A01N43/90A01N39/02A01P13/00
CPCA01N43/90A01N39/02
Inventor 陈佛祥王礼文朱刚吴泽伟张志伟
Owner GUANGDONG ZHONGXUN AGRI TECH
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